cente-, -centesis

(Greek: perforation, puncture, or tapping, as with an aspirator or needle)

abdominal paracentesis
1. The surgical puncture of the abdominal cavity for the removal of fluid for diagnosis or treatment.
2. A puncture of the wall of a fluid-filled cavity with a hollow needle to draw off the contents for medical diagnosis.
A procedure whereby a needle is introduced into the abdominal cavity for aspirating fluid (removal by suction of a fluid from a body cavity using a needle).

The procedure is used for diagnostic or therapeutic purposes.

1. Paracentesis (surgical puncture of the abdominal wall cavity for the aspiration [removal by suction] of peritoneal fluid); that is, puncturing of the abdomen with a hollow needle or trocar, usually for the purpose of withdrawing fluid.
2. Puncture of the abdomen with an instrument for withdrawal of fluid from the abdominal cavity for medical diagnosis.
arthrocentesis (s) (noun), arthrocenteses
A puncture of a linking area of the bones with a sterile needle in order to drain excessive accumulated fluid from it: Arthrocentesis is helpful in relieving swelling and pain in structures between the bones.

Due to a sports injury, Bruce had what was called "water-on-the-knee"; so, the doctor used arthrocentesis to draw off the liquid and relieve his discomfort.

In surgery, a deep puncture; such as, into a cavity or tumor.
Removal of fluid, as from the eye, with an electrically activated instrument.
ophthalmocentesis (s) (noun), ophthalmocenteses (pl)
The surgical drainage of the eye or eyes.
paracenesthesia (s) (noun), paracenesthesias (pl)
Any abnormality of the general sense of well-being: After several months of gray, overcast skies, Dorothy experienced an overwhelming paracenesthesia.
A procedure in which a body cavity is punctured with a needle from the outside.

Paracentesis is most often performed to remove fluid for analysis to aid daanosis of medical conditions causing ascites, a reference to fluid which collects in the abdominal cavity.

Ascites can occur as a result of a number of conditions, including severe liver disease and the presence of malignant cells within the abdomen.

The paracentesis process may also be performed to relieve pressure due to excess fluid or to instill drugs.

Abdominal or thoracic paracentesis is most common; however, other sites include the pericardium and the scrotum

The procedure is usually carried out using local anesthesia and it is said to be quick and relatively painless.